Thomas Henry Huxley

"The great end of life is not knowledge but action."

"Accept nothing on authority, but put every statement to the test of facts."

"Every animal is in some sense made after the image of every other animal."

"The path of culture lies along the middle ridge."

"A man who will not listen to any ideas save his own is in a state of invincible ignorance."

"What knowledge is most worth having if not the knowledge of our own nature?"

"The chief function of the imagination is to help us to make sense of the world."

"In nature there is no good or evil, only change and conservation."

"Truth is obtained through experience, not through imagination."

"The universe has no beginning and no end; it is eternal."

"To understand the present, you must understand the past."

"The development of the human intellect is the great end of life."

"A man's first duty is to question the received wisdom of his time."

"The beauty of the world lies in seeing it clearly."

"There is no more prolific source of misunderstanding than the use of words."

"All progress depends on the unreasonable man."

"The greatest delight is in the recognition of hidden harmonies and beauties."

"To succeed you must first believe in yourself and then work without ceasing."

"A lawyer is a gentleman, but a gentleman is not necessarily a lawyer."

"I would rather be the man who bought the Brooklyn Bridge than the man who sold it."

"The nature of things is to be found in the observation of things themselves."

"The world is full of possibilities; the challenge is to see them."

"Veracity is the heart of morality."

"To a man in love, the whole world is beautiful."

"The foundation of theology is to ascertain the character of God."

"Death is the inevitable outcome of life, and to deny this is to deny reality."

"The essence of education is to know what is worth knowing."

"I know not whence I came, nor where I go."

"The remedy for bad philosophy is good philosophy."

"Man's struggles and triumphs are in the pursuit of truth."